package com.my.demos.config;

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.CustomExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.HashMap;
import java.util.Map;

/**
 * @author zhupanlin
 * @version 1.0
 * @description: TODO
 * @date 2023/12/1 15:19
 */
@Configuration
public class DelayedQueueConfig {
    
    // 交换机
    public static final String DELAYED_EXCHANGE_NAME = "delayed_exchange";
    // 队列
    public static final String DELAYED_QUEUE_NAME = "delayed.queue";
    // routingKey
    public static final String DELAYED_ROUTING_KEY = "delayed_routingkey";
    
    
    // 声明交换机
    @Bean
    public CustomExchange delayedExchange(){
        Map<String, Object> arguments = new HashMap<>();
        arguments.put("x-delayed-type", "direct");

        /**
         * 1.交换机的名称
         * 2.交换机的类型
         * 3.是否需要持久化
         * 4.是否需要自动删除
         * 5.其它参数
         */

        return new CustomExchange(DELAYED_EXCHANGE_NAME, "x-delayed-message",
                false, false, arguments);
    }
    
    @Bean
    public Queue delayedQueue(){
        return new Queue(DELAYED_QUEUE_NAME);
    }
    
    // 绑定
    @Bean
    public Binding delayedQueueBindingDelayedExchange(@Qualifier("delayedQueue") Queue delayedQueue,
                                                      @Qualifier("delayedExchange") CustomExchange delayedExchange){
        return BindingBuilder.bind(delayedQueue).to(delayedExchange).with(DELAYED_ROUTING_KEY).noargs();
    }
    
}
